User blog comment:Exampasdjfka;g/Blaziken EVs/@comment-32092633-20180102013837

To reset your EVs,go to the Battle Colloseum and purchase whatever you need to reset.This costs 20 BP.

Also,that isn't a nature,that's a characteristic.

I would suggest EV training in Attack,and replacing Overheat.I would also suggest in Training in Special Defense for defense against Water type and Psychic type moves or train in Speed for easy knockouts.